Question

A car travels at a speed of 80 km/h. Which of the following is correct to convert the speed of the car to hm/s? [1 km = 10 hm, 1 h = 3600 s]

A divide 80 by 3600
B multiply 80 by 3600
C divide 80 by 10 and multiply the result obtained by 3600
D multiply 80 by 10 and divide the result obtained by 3600

Answer 1

D. Multiply 80 by 10 and divide the result obtained by 3,600

Step-by-step explanation:

Answer 2

Answer: The correct answer is Option D.

Step-by-step explanation:

We are given that car travels with a speed of 80 km/hr and we need to convert it into hm/s.

For that we use the conversions:

1 kilometer = 10 hectometer

And, 1 hour = 3600 seconds

To convert the quantity into hm/s, we multiply the numerator which is 80 by 10 to convert the whole quantity into hm/hr and now, to convert the result into hm/s finally, we divide the result by 3600.

`\Rightarrow ((80km1)/(hr))((10hm)/(1km))=(80km)/(hr)\\\\\Rightarrow ((80km)/(hr))((1hr)/(3600s))=(80hm)/(3600s)`

Hence, the correct answer is option D.